/*!
 *
 * Copyright (c) 2020-2022 Diality Inc. - All Rights Reserved.
 * \copyright
 * THIS CODE MAY NOT BE COPIED OR REPRODUCED IN ANY FORM, IN PART OR IN
 * WHOLE, WITHOUT THE EXPLICIT PERMISSION OF THE COPYRIGHT OWNER.
 *
 * \file    ApplicationController.h
 * \author  (last)      Behrouz NematiPour
 * \date    (last)      24-Aug-2022
 * \author  (original)  Behrouz NematiPour
 * \date    (original)  26-Aug-2020
 *
 */
#pragma once

// Qt
#include <QObject>

// Project
#include "main.h" // Doxygen : do not remove
#include "MModel.h"
#include "ApplicationPost.h"
#include "GuiGlobals.h"
#include "MessageGlobals.h"
#include "DeviceGlobals.h"

// define
#define _ApplicationController ApplicationController::I()

// forward declarations
class tst_initializations;

// namespace
using namespace Gui;
using namespace Can;

/*!
 * \brief   The ApplicationController class
 * \details Singleton class which is the main gateway of all signal/slots.
 *          This class is the main gate keeper for decisions and will decide if a message should pass through the other observers.
 *          Currently (08/30/2020) is a bridge and will pass all the messages.
 *          Later with implementation/help of the main state machine will decide on the state of the device what needs to be done.
 * \note    States are like [Idle, Run on Battery, Fault, FW connection lost] and such
 */
class ApplicationController : public QObject {
    Q_OBJECT

    // Singleton
    SINGLETON(ApplicationController)

    // friends
    friend class ::tst_initializations;

    QThread *_thread = nullptr;
    bool     _init   = false;

    QFutureWatcher<void> _settingsWatcher;

    ApplicationPost _post; // I may need to be put in a concurrent.

public:
    void initSettings();

public slots:
    bool init();
    bool init(QThread &vThread);
    void quit();

private:
    void initConnections();

    void initThread(QThread &vThread);
    void quitThread();

    void keepAlive();

    void createFakeSequencedLongMessage (QVariantList &vData, const int vFakeDataLen);
    void createFakeSeqAtBeginLongMessage(QVariantList &vData, const int vFakeDataLen);

    void settingsInit();

private slots: // Should be private for thread safety and is connected internally.
    void onActionReceive (GuiActionType vAction, const QVariantList &vData); // UI <= HD/DG
    void onActionTransmit(GuiActionType vAction, const QVariantList &vData); // UI => HD/DG

    void onMainTimerTimeout();

    void onUSBDriveMount ();
    void onUSBDriveUmount();
    void onUSBDriveRemove();
    void onUSBSpaceChange(bool vReady, qint64 vTotal, qint64 vAvailable, quint8 vPercent);

    void onSDCardStateChange(bool vIsReady, bool vIsReadOnly);
    void onSDCardSpaceChange(bool vReady, qint64 vTotal, qint64 vAvailable, quint8 vPercent);
    void onSDCardSpaceTooLow(quint8 vAvailablePercent);

    void onExportLog        ();
    void onExportService    ();
    void onExportTreatment  ();
    void onExport           ();

    void onFailedTransmit(Sequence seq);

    void onSettingsInit();
    void onSettingsUpdate();

    void onPOSTWiFi         (bool vPass);
    void onPOSTBluetooth    (bool vPass);
    void onPOSTCloudSync    (bool vPass);

    void onPOSTFail         (Gui::GuiAlarmID vAlarmID);
    void onPOSTDone         (bool vPass);

signals:
    void didPOSTWiFi        (bool vPass);
    void didPOSTBluetooth   (bool vPass);
    void didPOSTCloudSync   (bool vPass);

signals:
    void didActionReceive (GuiActionType vAction, const QVariantList &vData); // UI <= HD/DG
    void didActionTransmit(GuiActionType vAction, const QVariantList &vData); // UI => HD/DG
    void didFailedTransmit(Sequence seq);

    void didUSBDriveMount ();
    void didUSBDriveUmount();
    void didUSBDriveRemove();
    void didUSBSpaceChange(bool vReady, qint64 vTotal, qint64 vAvailable, quint8 vPercent);

    void didSDCardStateChange(bool vIsReady, bool vIsReadOnly);
    void didSDCardSpaceChange(bool vReady, qint64 vTotal, qint64 vAvailable, quint8 vPercent);
    void didSDCardSpaceTooLow(quint8 vAvailablePercent);

    void didExport        ();

    /*!
     * \brief   didSettingsInit - private signal to start initializing settings
     * \details This signal used internally to make the read task of the settings happen in Application_Thread
     *          It's because no thread assigned to Settings itself, since this class will be used only once
     *          and does not need a thread by itself
     */
    void didSettingsInit  (QPrivateSignal);
    /*!
     * \brief   didSettingsDone
     * \details This signal will be emitted when the settings are read and ready to be used.
     */
    void didSettingsDone  ();

    // Device Signal/Slots
    DEVICE_APP_BRIDGE_DEFINITION_LIST

    // ---- Signal/Slots
    ADJUST_TRANSMT_MODEL_BRIDGE_DEFINITIONS
    ACTION_RECEIVE_MODEL_BRIDGE_DEFINITIONS

    ACTION_RECEIVE_PRIVATE_SLOT_NOEMIT(UIPostFinalResultHDRequestData) {
        onPOSTDone(_post.isDone());
        emit didActionReceive(vData);
    }

    // TODO: do the same for Settings.
    SAFE_CALL(startPOST)
};